US2338204A - Machine for equipping box parts with fastening means - Google Patents

Description

Jan, 4, 1944. A.. l... ROSENMUND 2,338,534

MACHINE FCR JQL'FNI- 5G31 PA''S '"I-I FASTENINC- MEANS Fileclepz, l5, 94C 3 Sheets-Sheet l L L {WENTOR [L /'Q Alfred L. Rose/:mund

ATTORNEY Jan. 4, 1944. A, RosENMuND MACHINE FOR EQUIPPING 'BOX PARTS WITH FASTENING MEANS Filed Sept. v16I 1940 3 Sheets-Sheet 2 Fig. 6.

Jan. 4, 1944. A. L. RosENMUND 2,338,204.

MACHINE FOR EQUIPPING BOX PARTS' WITH FASTENING MEANS Filed Sept. 416 1940 3 Sheets-Sheet E lNvNToR A/fred L. Rose/,mund

ATTORNEY Patented Jan. 4, 1944 MACHINE Fon EQUIPPING Box PARTS v wir-H rAsTENING MEANS Alfred L. Rosenmund, Woodport, N. J., assignor to Stapling Machines Co., a corporation of Delaware Application September 16, 1940, Serial No. 356,900

2 Claims.

This invention relates to machines for equipping wired box parts with fastening means.

It is an object of the invention to provide irnproved Wire-manipulating mechanisms for forming a loop or bight on a wire secured to a box part and `for perpetuating the loop or bight by driving the end of the wire into the box part.

One illustrative embodiment of the invention is shown in the accompanying drawings, in which- Figure 1 is a side elevation of a fastener-supplying machine embodying the invention, showing a portion of the right-hand jaw member broken awas7 and the clutch unit omitted for clearness.

Fig. 2 is a top plan view taken on line 2-2 of Fig. 1.

Fig. 3 is an enlarged sectional view of the clutch unit taken on line 3-3 of Fig. 2.

Fig. 4 is a side elevation of the front end of the machine, showing a prong being formed on the binding wire after the wire has been cut to the desired length.

Fig. 5 is an enlarged View of a portion of Fig. 4, showing more clearly the prong-forming operation and the elements involved.

Fig. 6 is an enlarged view taken on the line 6 6 of Fig. 4, showing the cycle of operation slightly advanced, with the prong portion being bent into position to form a bight byparts acting upon it from above.

Fig. 'l is an enlarged plan View taken on the line 1-1 of Fig. 4, showing the bight-forming parts in the same position as in Fig. 6.

Fig. 8 is an enlarged sectional view taken on the line 8-8 of Fig. 4.

Fig. 9 is a front end View taken from the left side of Fig. 4, with some parts in section and others omitted for clearness, showing the means to properly position the binding wire.

Fig. 10 is an enlarged partial front end View showing, in broken lines, an element to position the prong and,'in full lines, the driving elements after completion of a driving operation.

Fig. 11 is an enlarged side elevation taken on the line II--H of Fig. 10, showing, in broken lines, the prong in position to be driven and, in full lines, the prong driven through the work to be clinched. i

Fig. 12 is a partialtop planv view of Fig. 11, showing vthe bight-forming elements returned to their initial position.

Fig. 13 is an enlarged plan viewtaken on the line |3--I3 of Fig. 11, showing the bight-forrning elements after the bight has been completed and theprong driven.'

Fig. 14 is a partial View, on the same scale as Fig. 11, showing the clinching of the prong and illustrating, by broken lines, the work-supporting table lowered to strip the bight from the forming elements.

Fig. 15 is an isometric view showing a cornpleted fastener having its bight portion located a. predetermined distance from the forward edge of the sheet ofveneer or plywood.

In Figs. 1 and2, there is illustrated a machine embodying the invention, the primary object of which is to provide appropriate mechanisms which operate upon the binding wire from above to form a bight and to perpetuate the bight by driving the prong thereof through the veneer or plywood or other suitable material to locate the fastener a desired distance from the edge of the work, as illustrated in Figs. 13 and 15.

The wired -box parts to which these fasteners are supplied are made on a box-blank machine which staples the wire to the box parts. As shown in Fig. 15, the box part is designated a, the binding wire b, and the staple c.

Referring `again to Figs. 1 and 2, the machine comprises a base l, upon which is mounted a right jaw 2 and a left jaw 3. The left jaw 3 has an upper extension `5 and a lower extension 4. These extensions 4 and 5 support the mechanisms that operate upon the binding wire b to sever it to correct length, to form a prong thereon, to bend the prong portion to bring it over the box part a to form a bight, to drive the prong end through the box part, and to clinch the prong end to perpetuate the fastener.

Motion is imparted to a drive pulley 5 rotatably ymounted on a main shaft S by means of a belt connection to a motor 9. The drive pulley 6 houses therein a clutch unit (Fig. il) similar to the clutch unit of United States Patent No. 2,130,486 of September 20, 1938, to E. M. Florcyk.

lThe clutch as shown in Fig. 3 is disengaged from the drive pulley 6. l

Generally, the clutch comprises a member lil keyed to the main shaft 8, which carries integrally thereon an ear Il and an extension l2, to-

which is loosely mounted on a pin i3 a member I4 which has secured to its outer surface adjacent the clutchingsurface 'l of the drive pulley 8 one end of a divided clutch band I5. Loosely mounted on the keyed member It) is a flanged collar I which supports an ear I8 and an extension I9, to whicha shoe 2B is connected by a toggle link 2|. Secured to the outer surface of the shoe Zis the other end of the clutch band l5. `.A suitable .notchis provided in a flange Il of the flanged collar I6 which the buffer 23 contacts to disengage the clutch and to cause energy to be stored in a coiled spring 22 which has one end fastened to the ear Il of the member IIJ keyed to the main shaft 8 and has its other end fastened to the ear I8 of the loosely mounted flanged collar I5 (Fig. 3). Thus, when the buffer 23 is moved to the position shown in broken lines in Fig. 3, the coiled spring 22 will be permitted to contract, rotating the flanged collar I6 sufficiently about the member l to cause the clutch band l to expand and clutch the surface 1 provided therefor in the drive pulley 6.

An appropriate brake unit 24 is provided, which is relatively timed to cause a braking action of the main shaft 8 instantly following the disengagement of the clutch from the drive pulley 6.

A foot treadle 25, loosely mounted on shaft 26, is connected by appropriate linkage and levers to operate the clutch buffer 23 and the brake unit 24 simultaneously. Since the operation of supplying a complete fastener requires only one cycle of the main shaft 8, it is necessary only to press the treadle 25 down to remove the buffer 23 from its engagement with the notch in the flange l1 and at the same time release the brake unit 24 against the action of spring 21 which holds the buffer 23 in contact with the outer surface of flange I1 until permitted to drop into the notch provided therein.

A cam 28 keyed on the main shaft 8 is of such design as to impart an oscillating motion to an upper carriage 38 and to a lower carriage 23 through appropriate connection therewith.

The lower carriage 29 comprises an inverted open framework having two horizontal rods 30 interposed between the end portions. The rods Si? are spaced apart to coincide with bores in members 3| permanently secured to the inside surface of the lower extension 4. A turnbuckle link 32 pivotally secured to the rear of the lower carriage 29 is pivotally secured by a stud 33 to a lever 33 loosely mounted on stud 35 threaded in the inside of the left jaw 3. The upper end of the lever 34 has rotatably mounted thereon a roller 3S which is pressed against the face of the cam 23 by the action of a spring 31 which has one end fastened to the lower part of lever 34 and the other end fastened to the inside of the left jaw 3.

The upper oscillating carriage 38 is similarly controlled. It too comprises an open framework with two conveniently spaced horizontal rods 39 which are housed in bearings in the member 40 secured to the inside of the upper extension 5. A turnbuckle link 4l pivotally secured to the upper carriage 38 is pivotally secured also to a lever S2 by stud 43.

The lever 42, loosely mounted on stud 44 threaded in the inside of the left jaw 3, has its lower portion conveniently angled to present a roller 45, rotatably mounted on the end thereof, to the work face of the cam 28. The roller 45 is held in contact with the cam by the action of a spring 45 fastened to the upper portion of the lever l2 and the inside of the left jaw 3.

Referring to Figs, 1, 2, 4, and 9, and particularly to Figs. 1 and 9, the table provided to support the work consists of two horizontal bars 41 with hangers 48 loosely mounted on shaft 49. The horizontal bar 41 adjacent the outside of the left jaw 3 has an extension to the rear of the machine and is anchored by a spring 50 fastened thereto and to the lower portion of the left jaw 3. Spaced apart and secured on the top surface at the front end of the horizontal bars 41 are flat cross-members 5I which are also supported by short bars 52 permanently mounted on tie rods 54 extending through each horizontal bar 41 and secured by nuts. The short bars 52 are separated by a spacer 55 which permits a clincher H32 to function freely, as will be described later. A link 56, loosely mounted on the tie rod 5ft, extends downwardly to connect to an auxiliary foot treadle 51 which is loosely mounted on the shaft 25, its purpose being to pull the table down against the action of the spring 56 at the completion of a fastener-supplying opl eration.

As shown in Figs. 4, 5, and 8, the lower oscillating carriage 29 has securely mounted on its top surface a straight-motion cam 58 designed to support on its work face a roller El loosely 20 mounted on a stud 62 secured in a downwardly extending projection of a support block 6i] which carries on its top surface the movable knife 63 and prong-forming die 64, shown clearly in Figs.

5 and 8. The support block 60 has imparted thereto a vertical reciprocating motion through the roller 6I` following the contour of the straight-motion cam 58.. The support b1ockf60, with the bearing on member 65, also is guided by a rectangular bar E9 and a rod 13, both of 30 which are detachably secured in the housingr block 68 and extend downwardly into bearings provided n the support block 50. To insure that the roller 5I follows the contour of the work face of the straight-motion cam 58, there is provided 35 a spring 1| interposed between the botto-m surface of the housing block 58 and the bottom of a counterbore in the support block 66, and coiled about the rod 10. There is also provided, to co act with the spring 1I and to serve as .a stop 40 member as well, another downwardly-extending portion 66 of the support block 60 which carries in its lower portion a stud 61 adjacent the side of the straight-motion cam 58 to contact a member 59 supported by ycam 58, whose beveled contour parallels that of the latter portion of cam 58, preventing the roller 6l from leaving the surface of cam 58 whenthe support block 6i! descends to release the prong on binding wire b from the prong-forming elements.

As shown in Figs. 4 and 9, the housing block 68 secured to the inside surface of the upper extension 5 is relatively located `to cooperate with the mechanism just described and to have certain elements that it supports acted upon by a straight-motion cam 12 permanently secured to the under surface of the upper carriage 38. Referring now to Figs. 6 and 7, the under surface of the housing block 68 has detachably mounted thereon a fixed knife 13 which carries a suitable beveled notch 14 in its forward bottom edge adjacent to a detachably-secured forming member 15, both of which coact with the forming die 64 of the support block 6i), as shown in Fig. 5. Ref erence to Figs. 4, 6, and '1 shows a vertical shaft 16 rotatably mounted in a bore of the housing block 68 which has secured to its bottom end a loop former 11 so shaped that when swung in the direction indicated by the arrow yin Fig. 6 it will contact the wire b and bend it about a loop bar 19 which is conveniently located and secured to the under surface. of the housing block 68. To impart the desired swinging movement to the loop former 11, the upper end of the vertical shaft 16 has secured thereon a loop former lever 18 which is urged to rotate by atrigger 80 Cil (Figs. 4 and 9,) loosely mounted von fstud f8| threaded in the side of thestraight-motionfcam 12. The trigger 89 is yieldingly held in operating position by a spring 82 fastened thereto ,and to the upper carriage 38. The loop-forming unit, comprising the vertical shaft 16, the loop former 11, and the loop former lever 18, will return Ato its initial position set bythe adjustable stop l83, by the action of a spring 84 fastened to a stud in the loop former lever 18 and to a stud 85 threaded in the top Nsurface of the housing block B9, when permitted by the trigger 80, as shown in Figs. 10 and 11.

A slot 86 near the forward end of the housing block 88 has detachably secured therein a downwardly projecting member 81, at the :bottom of which, against the beveled side, the correct ,location of the binding wireb is determined, as shown in Figs. 9 and 10.

The slot 85 also retains therein, fby -means of l l and 11, the legs of the inverted-U-shaped l member 89 are astride the downwardly-projecting member 81 and also a flat member 94 fastened to the inside of the cover plate 88 which has loosely mounted in the bottom portion thereof a flap 95 which is yieldingly held open (see Fig. 9 and broken lines in Fig. by a torsion spring 93 (Fig. l1).

As shown in Figs. 9 and 10, a driver 91, which projects slightly beyond the bottom surface of the legs of the inverted-U-shaped member 89 is securely riveted in slots which are located so that when the prong is properly located against the side of the downwardly-projecting member 81 by the nap 95 which is urged to a closed position by a cross-bar 98 riveted to the outside lower portion of the legs of the inverted-U-shaped member 89, it will be directly in the path of the driver 91.

Referring to Figs. 4, l0, 11, and 14, the upper surface of the lower carriage 29 has permanently secured thereon an upstanding member 99, the uppermost part of which is suiciently reduced in thickness to provide for shoulders |88, upon which rest blocks 53 secured to the under surfaces of the short bars 52, Vthus supporting the table unit upon which the Work rests during a driving operation. The top surface of the reduced portion of the upstanding member 99 has a lobe lill shaped thereon, which contacts and urges upward a clincher |02 which is located between the short bars 52 and loosely mounted on a pin |93 secured in the short bars 52.

The operation of the machine is as follows:

With the motor 9 energized, the drive pulley 9 will rotate continuously in a clockwise direction, as indicated by the arrow in Fig. 1; and with the clutch disengaged therefrom, as shown in Fig. 3, the several mechanisms will be at rest in their normal positions, as shown in Figs. 1 and 2. The box part with the wires on the top surface is placed horizontally on a table of desired height in front of the machine. The box part is then moved sidewise from the left to enter between 'thefhousingfblock secured to the upper extension Stand .theiilatfoross-,members 5l which, 'with otherimembers, YV.constitute a yieldable Supportfor the '.work. In moving the box part sidewise, the portion of binding Wire b projecting beyond the `edge of .the box part will follow the contour of .the forming die 64 (Fig. 3) until correctly located thereon ywhen the body of the binding Wire b stapled .to the box part contacts the downwardly-projecting member 81, as shown in Figs.

9 and'lO. With the wire b in position, as indicated by dot-and-dash lines in Fig. 6, and the forward edge of the box part located by stop members (Fig. 4) provided for that'purpose, the foot treadle25 is pressed downward, and, through appropriate linkage and levers, the brake. unit 24 and the clutch buffer 23 are simultaneously released to permit the elements of the clutch to Vfunctioncausing the clutch band l5 to be thrust into clutching engagement with thesurface 1 of the drive pulley 6 to rotate the main shaft 8. The rotation of the cam `28 will urge the lever 34, through its contact with roller 38,'to draw the lower carriage 29 towardthe rear of the kmachine or'from itsposition as shown in Fig. 1 to the position shown in Fig. 4, during which the straight-motion cam 58 raises the support block 50 by means of its contact with the roller El to sever the wire b to correct length by the coaction of the movable knife 63 and the fixed knife 13. Immediately following this, the prong is formed by the upward motion of the forming die 64 against the wire b, which is momentarily held and guided by the beveled notch 14 to form the driven portion of the prong, while further upward motion of the forming die 64 presses the wire b against the angular forming member 15, thus completing the prong. At this point in the cycle, the upper carriage 38 has moved from its position in Fig. 1 toward the rear of the machine, permitting the trigger 88 to contact the loop former lever 18 (Fig. 4) and has advanced slightly, which has caused the loop former 11 to bend the wire b about the loop bar 19.

Continued forward movement of the upper carriage 38 and the 'straight-motion cam 12 causes the loop former 11 to bend the Wire b about the loop bar 19 until it is positioned against the inside surface of the downwardly-projecting member 81, at which point the trigger is urged to ascend the beveled top surface of the inverted-U-shaped member 89, thereby releasing the loop former lever 18, which returns to its initial position against the adjustable stop 83 (Fig. 12). Just prior to this movement of the loop former lever 18, the inverted-U-shaped member 89 has been urged downward suiliciently, by the contact of the straight-motion cam 12v and the roller 98, so that the cross-bar 98 has caused the flap 95 to close against the prong. Further forward movement of the straight-motion cam 12, as shown in Fig. 10, 11, and 13, causes the driver 91, which projects slightly beyond the bottom surface of the legs of the inverted-U-shaped member 89 to drive the prong through the box part, since the unit upon which it rests is supported by the blocks 53' of the short bars 52 resting upon the shoulders of the upstanding member 99, which has assumed this position on movement of the lower carriage 29 toward the rear of the machine, which movement is reversed immediately following the driving of the prong. The forward movement of the lower carriage 29 and the upstanding member 99 causes the lobe vIvlll to contact the clincher |02, as shown in `Fig.`14, clinching the portion oi the prong protruding 'from the under surface of the box part, in the opposite direction from the bight. This completes the fastener operation, as shown in Fig. 15; and the mechanism comes to rest, as shown in Fig. 1. The auxiliary foot treadle 51 is pressed downward, which pulls the Work-supporting table down, by means of the connecting link 56, to the position shown in dot-and-dash lines in Fig. 14. By this operation the bight is stripped from the loop bar '19 and the box part may be moved to locate the next Wire b.

It should be noted that the cutting, prongforming, loop-forming, and driving instrumentalities are all located above the box part being operated upon and therefore are adapted to form and perpetuate aA loop or bight within the surface area of the box part, i. e., with no portion of the loop or bight extending beyond the edge of the box part.

It should be noted also that said instrumentalites are operated by straight-motion cams.

It will be understood that the invention is not to be limited to the specific embodiment shown herein for illustration.

I claim:

1. In a machine for forming and perpetuating a loop or bight on a Wire secured to a box part, the combination of a support for the box part and loop-forming instrumentalities comprising means to bend the wire to form a loop and means to drive the end of the wire into a box part to perpetuate the loop; said instrumentalities being located and operable above and within the surface area of a box part positioned on the support, whereby a loop or bight may be formed to lie wholly within the surface area of the box part.

2. In a machine for forming and perpetuating a loop or bight on a wire secured to a box part, the combination of a support for the box part, loop-forming instrumentalities comprising means to bend the Wire to form a loop and means to drive the end of the Wire into the box part to perpetuate the loop, and straightmotion cams for operating said instrumen'talties.

ALFRED L. ROSENMUND.

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